package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSON;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.common.constants.NewsAutoScanConstants;
import com.heima.common.constants.message.WmNewsMessageConstants;
import com.heima.common.constants.wemedia.WeMediaConstants;
import com.heima.common.exception.CustException;
import com.heima.common.exception.CustomException;

import com.heima.model.common.constants.WemediaConstants;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.NewsAuthDto;
import com.heima.model.wemedia.dtos.WmNewsDto;
import com.heima.model.wemedia.dtos.WmNewsPageReqDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.model.wemedia.vos.WmNewsVo;
import com.heima.utils.threadlocal.WmThreadLocalUtils;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsService;
import io.seata.spring.annotation.GlobalTransactional;
import org.apache.commons.lang3.StringUtils;
import org.apache.kafka.common.protocol.types.Field;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.*;
import java.util.stream.Collectors;

@Service
public class WmNewsServiceImpl extends ServiceImpl<WmNewsMapper, WmNews> implements WmNewsService {

    @Value("${file.oss.profix}")
    String profix;

    @Value("${file.oss.endpoint}")
    String endpoint;

    @Value("${file.oss.web-site}")
    String webSite;
    @Autowired
    WmNewsMaterialMapper wmNewsMaterialMapper;
    @Autowired
    private KafkaTemplate kafkaTemplate;
    @Autowired
    WmUserMapper wmUserMapper;
    @Autowired
    WmMaterialMapper wmMaterialMapper;
    @Autowired
    WmNewsMapper wmNewsMapper;

    /**
     * 根据标题和审核状态查询文章列表
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findNewsByTitleAndStatus(WmNewsPageReqDto dto) {
        //1 参数检查
        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        dto.checkParam();
        //2 条件封装执行查询
        LambdaQueryWrapper<WmNews> wrapper = new LambdaQueryWrapper<>();
        // 文章标题模糊查询
        if (StringUtils.isNotBlank(dto.getKeyword())) {
            wrapper.like(WmNews::getTitle, dto.getKeyword());
        }
        // 文章状态
        if (dto.getStatus() != null) {
            wrapper.eq(WmNews::getStatus, dto.getStatus());
        }
        // 按照创建日期倒序
        wrapper.orderByDesc(WmNews::getCreatedTime);
        // 分页条件构建
        Page<WmNews> page = new Page<>(dto.getPage(), dto.getSize());

        //3 执行查询
        IPage<WmNews> pageResult = page(page, wrapper);
//4 返回封装查询结果
        ResponseResult result = new PageResponseResult(dto.getPage(), dto.getSize(), pageResult.getTotal(), pageResult.getRecords());
        // 处理文章图片
        result.setHost(webSite);
        return result;
    }

    /**
     * 查询所有自媒体文章
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findAll(WmNewsPageReqDto dto) {
        //1 参数检查
        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        dto.checkParam();

        //2 条件封装执行查询
        LambdaQueryWrapper<WmNews> wrapper = new LambdaQueryWrapper<>();

        // 文章标题模糊查询
        if (StringUtils.isNotBlank(dto.getKeyword())) {
            wrapper.like(WmNews::getTitle, dto.getKeyword());
        }
        // 频道id
        if (dto.getChannelId() != null) {
            wrapper.eq(WmNews::getChannelId, dto.getChannelId());
        }
        // 文章状态
        if (dto.getStatus() != null) {
            wrapper.eq(WmNews::getStatus, dto.getStatus());
        }
        // 发布时间
        if (dto.getBeginPubDate() != null && dto.getEndPubDate() != null) {
            wrapper.between(WmNews::getPublishTime, dto.getBeginPubDate(), dto.getBeginPubDate());
        }
        // 当前自媒体人文章
        WmUser user = WmThreadLocalUtils.getUser();
        if (user == null) {
            CustException.cust(AppHttpCodeEnum.NEED_LOGIN);
        }
        wrapper.eq(WmNews::getUserId, user.getId());
        // 按照创建日期倒序
        wrapper.orderByDesc(WmNews::getCreatedTime);
        // 分页条件构建
        Page<WmNews> page = new Page<>(dto.getPage(), dto.getSize());

        //3 执行查询
        IPage<WmNews> pageResult = page(page, wrapper);

        //4 返回封装查询结果
        ResponseResult result = new PageResponseResult(dto.getPage(), dto.getSize(), pageResult.getTotal(), pageResult.getRecords());
        // 处理文章图片 
        result.setHost(webSite);
      
       return result;
    }

    /**
     * 自媒体文章发布
     *
     * @param wmNewsDto
     * @param isSubmit  是否为提交 1 为提交 0为草稿
     * @return
     */
    @Override
    @Transactional
    public ResponseResult saveNews(WmNewsDto wmNewsDto, Short isSubmit) {
        /*1参数校验*/
        if (wmNewsDto == null || StringUtils.isBlank(wmNewsDto.getContent())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        /*2保存或修改文章*/
        WmNews wmNews = new WmNews();
        BeanUtils.copyProperties(wmNewsDto, wmNews);
        if (wmNewsDto.getType().equals(WeMediaConstants.WM_NEWS_TYPE_AUTO)) {
            wmNews.setType(null);
        }
        /*将封面列表转换成字符串*/
        String images = imageListToStr(wmNewsDto.getImages(), webSite);
        if (StringUtils.isNotBlank(images)) {
            wmNews.setImages(images);
        }
        saveWmNews(wmNews, isSubmit);
        /**/
        // 3 关联文章和素材关系表
        List<Map> contents = JSON.parseArray(wmNewsDto.getContent(), Map.class);
        // 【新增】私有方法: 解析内容中图片列表
        List<String> materials = parseContentImages(contents);
        // 要求：只有当文章是提交审核时才保存文章和素材的关联关系
        // 3.1 关联文章内容中的图片和素材关系
        if (isSubmit == WmNews.Status.SUBMIT.getCode() && materials.size() > 0) {
            // 【新增】私有方法
            saveRelativeInfoForContent(materials, wmNews.getId());
        }

        // 3.2 关联文章封面中的图片和素材关系  封面可能是选择自动或者是无图
        if (isSubmit == WmNews.Status.SUBMIT.getCode()) {
            saveRelativeInfoForCover(wmNewsDto,materials, wmNews);
        }
        // 4 发消息给admin审核文章
        Map map = new HashMap();
        map.put("wmNewsId", wmNews.getId());
        kafkaTemplate.send(NewsAutoScanConstants.WM_NEWS_AUTO_SCAN_TOPIC, JSON.toJSONString(map));
        // 5 返回结果
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 根据文章id查询文章
     *
     * @param id
     * @return
     */
    @Override
    public WmNews findById(Integer id) {
        /*1参数校验*/
        if (id == null) {
            return null;
        }
        /*2执行查询*/
        WmNews wmNews = getById(id);
        if (wmNews == null) {
            return null;
        }

        /*3返回结果*/
        /*ResponseResult responseResult = ResponseResult.okResult(wmNews);
        responseResult.setHost(webSite);*/
        return wmNews;
    }
    /**
     * 根据文章id查询文章
     *
     * @param id
     * @return
     */
    @Override
    public ResponseResult findWmNewsById(Integer id) {
        /*1参数校验*/
        if (id == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        /*2执行查询*/
        WmNews wmNews = getById(id);
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }

        /*3返回结果*/
        ResponseResult responseResult = ResponseResult.okResult(wmNews);
        responseResult.setHost(webSite);
        return responseResult;
    }

    /**
     * 根据文章id删除文章
     *
     * @param id
     * @return
     */
    @Override
    public ResponseResult delNews(Integer id) {
        //1.检查参数
        if(id == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"文章Id不可缺少");
        }
        //2.获取数据
        WmNews wmNews = getById(id);
        if(wmNews == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"文章不存在");
        }

        //3.判断当前文章的状态  status==9  enable == 1
        if(wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode()) && wmNews.getEnable().equals(WemediaConstants.WM_NEWS_UPENABLE)){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"文章已发布，不能删除");
        }

        //4.去除素材与文章的关系
        wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery().eq(WmNewsMaterial::getNewsId,wmNews.getId()));

        //5.删除文章
        removeById(wmNews.getId());
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }


    /**
     * 图片列表转字符串，并去除图片前缀
     * @param images 图片列表
     * @param /webSite 图片前缀
     */
    public static String imageListToStr(List<String> images, String webSet) {
        return images.toString().replace("[","").replace("]","")
                .replace(webSet,"").replace(" ","");
    }


    /**
     * 【2】保存或修改文章
     * @param wmNews 文章对象（前端传递）
     * @param isSubmit 0 草稿  1 提交审核
     */
    private void saveWmNews(WmNews wmNews, Short isSubmit) {

        wmNews.setCreatedTime(new Date());
        wmNews.setUserId(WmThreadLocalUtils.getUser().getId());
        wmNews.setSubmitedTime(new Date());
        wmNews.setEnable(WeMediaConstants.WM_NEWS_UPENABLE); // 上架

        if (wmNews.getId()==null) { // 保存操作
            save(wmNews);
        }else {  // 修改
            // 当前文章 和 素材关系表数据删除
            wmNewsMaterialMapper.delete(Wrappers.<WmNewsMaterial>lambdaQuery()
                    .eq(WmNewsMaterial::getNewsId, wmNews.getId()));

            updateById(wmNews);
        }
    }
    /**
     * 解析内容中图片列表
     * @param /list
     * @return
     */
    private List<String> parseContentImages(List<Map> contentImages) {

        List<String> materials = new ArrayList<>();
        for (Map contentImage : contentImages) {
            if (contentImage.get("type").equals(WeMediaConstants.WM_NEWS_TYPE_IMAGE)) {
                String imageUrl = (String) contentImage.get("value");
                imageUrl = imageUrl.replace(webSite, "").replace(" ","");  // ****
                materials.add(imageUrl);
            }
        }
        return materials;
    }

    /**
     * 【3.1】关联文章内容中的图片和素材关系
     * @param materials
     * @param newsId
     */
    private void saveRelativeInfoForContent(List<String> materials, Integer newsId) {
        // 保存素材和文章关系，抽取一个独立方法执行关联操作，原因当前方法可以复用
        saveRelativeInfo(materials, newsId, WeMediaConstants.WM_CONTENT_REFERENCE);
    }

    /**
     * 保存素材和文章关系
     *
     * @param materials 素材列表
     * @param newsId    文章ID
     * @param type      类型 0：内容中素材  1：封面素材
     */
    private void saveRelativeInfo(List<String> materials, Integer newsId, Short type) {
        //1 查询文章内容中的图片对应的素材ID
        List<WmMaterial> dbmaterials = wmMaterialMapper.selectList(Wrappers.<WmMaterial>lambdaQuery()
                .in(WmMaterial::getUrl,materials)
                .eq(WmMaterial::getUserId, WmThreadLocalUtils.getUser().getId())
        );
        //2 校验素材列表

        if (dbmaterials == null || dbmaterials.size() == 0) {
            throw new CustomException(AppHttpCodeEnum.FILE_MATERIAL_ISNULL_ERROR);
        }
        List<Integer> materialIds = new ArrayList<>();

        // {"1.jpg":55,"2.jpg":56}  草稿中的图片列表大于等于 数据库的素材
        Map<String, Integer> matreialMap = dbmaterials.stream()
                .collect(Collectors.toMap(WmMaterial::getUrl, WmMaterial::getId));

        for (String material : materials) {
            Integer id = matreialMap.get(material);
            if (id == null) {
                throw new CustomException(AppHttpCodeEnum.FILE_MATERIAL_ISNULL_ERROR);
            }
            materialIds.add(id);
        }

        //3 保存素材关系
        wmNewsMaterialMapper.saveRelations(materialIds,newsId,type);
    }

    /**
     * 【3.2】 关联文章封面中的图片和素材关系
     * @param wmNewsDto  前端用户选择封面信息数据
     * @param materials  从内容中解析的图片列表
     * @param wmNews     文章ID
     */
    private void saveRelativeInfoForCover(WmNewsDto wmNewsDto, List<String> materials, WmNews wmNews) {
        // 前端用户选择的图
        List<String> images = wmNewsDto.getImages();

        if (WeMediaConstants.WM_NEWS_TYPE_AUTO.equals(wmNewsDto.getType())) { // 自动获取封面 ****
            int materialSize = materials.size();
            if (materialSize > 0 && materialSize <= 2) {  // 单图
                images =  materials.stream().limit(1).collect(Collectors.toList());
                wmNews.setType(WeMediaConstants.WM_NEWS_SINGLE_IMAGE);
            } else if (materialSize > 2) { // 多图
                images =  materials.stream().limit(3).collect(Collectors.toList());
                wmNews.setType(WeMediaConstants.WM_NEWS_MANY_IMAGE);
            } else {  // 无图
                wmNews.setType(WeMediaConstants.WM_NEWS_NONE_IMAGE);
            }

            if (images != null && images.size() > 0) {
                wmNews.setImages(images.toString()
                        .replace("[", "")
                        .replace("]", "")
                        .replace(webSite, "")
                        .replace(" ",""));
            }
            updateById(wmNews);
        }

        if (images != null && images.size() > 0) {
            // 【新增】保存封面图和素材关系
            saveRelativeInfoForImage(images, wmNews.getId());
        }


    }
    /**
     * 保存封面图和素材关系
     * @param images
     * @param newsId
     */
    private void saveRelativeInfoForImage(List<String> images, Integer newsId) {
        //***
        images = images.stream()
                .map(x->x.replace(webSite,"")
                        .replace(" ","")).collect(Collectors.toList());

        saveRelativeInfo(images, newsId, WeMediaConstants.WM_IMAGE_REFERENCE);
    }

    /*上下架*/
    @Override
    public ResponseResult downOrUp(WmNewsDto dto) {
        //1.检查参数
        if(dto == null || dto.getId() == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }

        //2.查询文章
        WmNews wmNews = getById(dto.getId());
        if(wmNews == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"文章不存在");
        }

        //3.判断文章是否发布
        if(!wmNews.getStatus().equals(WmNews.Status.PUBLISHED.getCode())){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"当前文章不是发布状态，不能上下架");
        }

        //4.修改文章状态，同步到app端
        /*if(dto.getEnable() != null && dto.getEnable() > -1 && dto.getEnable() < 2){
            update(Wrappers.<WmNews>lambdaUpdate().eq(WmNews::getId,dto.getId()).set(WmNews::getEnable,dto.getEnable()));
        }*/
        wmNews.setEnable(dto.getEnable());
        updateById(wmNews);
        // ***发消息
        if(wmNews.getArticleId()!=null){
            Map<String,Object> mesMap = new HashMap<>();
            mesMap.put("enable",dto.getEnable());
            mesMap.put("articleId",wmNews.getArticleId());
            kafkaTemplate.send(WmNewsMessageConstants.WM_NEWS_UP_OR_DOWN_TOPIC,JSON.toJSONString(mesMap));
        }
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 查询需要发布的文章id列表
     *
     * @return
     */
    @Override
    public List<Integer> findRelease() {
        //查询状态为4或为8的数据且发布时间小于当前时间
        List<WmNews> list = list(Wrappers.<WmNews>lambdaQuery().le(WmNews::getPublishTime, new Date())
                .in(WmNews::getStatus, 4, 8)
                .select(WmNews::getId));
        List<Integer> idList = list.stream().map(WmNews::getId).collect(Collectors.toList());
        return idList;
    }


    /**
     * 根据状态进行审核
     *
     * @param wmNews
     * @param status 2 审核失败   4 审核成功
     * @return
     */


    /**
     * 根据状态和标题查询文章列表
     *
     * @param dto
     * @return
     */

    @Override
    public ResponseResult findList(NewsAuthDto dto) {
        /*1参数检查*/
        if (dto == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        dto.checkParam();

        /*分页参数处理*/
        /*获取当前页*/
        Integer page = dto.getPage();
        /*设置起始页码*/
        dto.setPage((page - 1) * dto.getSize());
        /*拼接标题*/
        if (StringUtils.isNotBlank(dto.getTitle())) {
            dto.setTitle("%"+dto.getTitle()+"%");
        }
        /*2分页查询*/
        List<WmNewsVo> listAndPage = wmNewsMapper.findListAndPage(dto);
        /*3统计条数*/
        long listCount = wmNewsMapper.findListCount(dto);
        /*4返回结果*/
        PageResponseResult result = new PageResponseResult(dto.getPage(), dto.getSize(), listCount, listAndPage);
        result.setHost(webSite);
        return result;
    }

    /**
     * 查询文章详情
     *
     * @param id
     * @return
     */

    @Override
    public ResponseResult findWmNewsVo(Integer id) {
        /*1参数检测*/
        if (id == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        /*2查询文章信息*/
        WmNews wmNews = getById(id);
        if (wmNews == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        /*3查询作者信息*/
        WmUser wmUser = null;
        if (wmNews.getUserId() != null) {
            wmUser = wmUserMapper.selectById(id);
        }
        /*4封装到vo里，返回*/
        WmNewsVo wmNewsVo = new WmNewsVo();
        BeanUtils.copyProperties(wmNews, wmNewsVo);
        if (wmUser != null) {
            wmNewsVo.setAuthorName(wmUser.getName());
        }
        ResponseResult responseResult = ResponseResult.okResult(wmNewsVo);
        responseResult.setHost(webSite);
        return responseResult;
    }

    /**
     * 自媒体文章人工审核
     * @param status 2  审核失败  4 审核成功
     * @param dto
     * @return
     */
    /**
     * 自媒体文章人工审核
     *
     * @param status 2  审核失败  4 审核成功
     * @param dto
     * @return
     */
    @Override
    public ResponseResult updateStatus(Short status, NewsAuthDto dto) {

        //1.参数检查
        if(dto == null || dto.getId() == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2.查询文章
        WmNews wmNews = getById(dto.getId());
        if(wmNews == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        //3.修改文章状态
        wmNews.setStatus(status);
        if(StringUtils.isNotBlank(dto.getMsg())){
            wmNews.setReason(dto.getMsg());
        }
        updateById(wmNews);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }
}